Roma and Qiong Qi followed Draco's tempo, their auras beginning to build. Even though Qiong Qi would not act, he still needed to provide deterrence so that no one would bother him.
Do not look at Roma's gentle and kind nature, that was only her natural state. Similar to Draco, she had different trains of thought, or a split personality of sorts.
Whenever she practiced her mystic arts, a new personality would surface, which was callous and cold. She would disdain and kill anything that stood in her way, because the mystic arts were a twisted field of magic.
For her not to become a mad witch was only because her mind was too pure to facilitate anything worse than what she currently displayed.
Draco didn't wield his swords. He first took out Pinaka as well as a variety of arrows, nocking them as he took aim. His Void of Perfection blasted out and covered everything within 10km of himself, allowing him to hone onto them.
Rain of Arrows!